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The absence of rigorous human trials means safety and efficacy remain unestablished, said Sohaib Imtiaz, MD, a board-certified lifestyle medicine doctor and chief medical officer for the People Inc

Potential for improved metabolic parameters

: Individuals with severe B12 deficiency, people with difficulty absorbing B12 (due to digestive conditions), or those looking for long-lasting effects from injections

S2CID 23493993

High B12 is a marker, not a cause

Long-term Effects and Sustainability Theres still a lot to learn about sticking with peptides for testosterone over the long haul, but heres some food for thought: Leaning on Peptides: Over-reliance might mean your own hormones get a bit lazy